Guest
After months of negotiations, Álvarez announced on his social media on 19 August 2021 that he would be facing undefeated IBF champion Caleb Plant on 6 November at the MGM Grand Garden Arena in Las Vegas, in an undisputed showdown for all four major world titles in the super middleweight division, with the winner set to become the first ever undisputed champion at that weight class. On 21 September 2021, the two fighters were engaged in a brief onstage scuffle during their first press conference, in which Álvarez initiated physical contact during their face-off when he shoved Plant. Álvarez stated that he had done this because he took offense to Plant's use of the word “motherfucker“, interpreting it as an insult to his mother. Plant denied to reporters that he had used the common American curse word in that context. Moreover, he drew attention to Álvarez's hypocrisy, accurately indicating that Álvarez had previously used the same slur against Demetrius Andrade on the night of 8 May 2021 in the aftermath of his fight against Billy Joe Saunders in Arlington, Texas. On fight night, Álvarez won the bout via eleventh-round technical knockout. He had knocked his opponent to the canvas with a left hook right uppercut combination in the penultimate round, before closing in to drop Plant again, prompting referee Russell Mora to call off the bout. At the time of the stoppage, Álvarez was ahead on the scorecards with 98–92, 96–94, and 97–93. With this win, he became only the sixth fighter to unify all belts in one division in the four-belt era
